Employee Stock Plans - Employee Stock Purchase Plan (Details) - ESPP - shares		9 Months Ended
Apr. 23, 2015	Sep. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Offering period		6 months
Additional shares of common stock reserved for issuance (in shares)	1,000,000.0
Shares reserved for issuance (in shares)		3,300,000
Percentage of employee's total compensation		20.00%
Maximum number of shares per offering period (in shares)		20,000
Fair market value of common stock (as a percent)		85.00%

Share-based Compensation Arrangement by Share-based Payment Award, Offering Period

No definition available.

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- Definition

Discount rate from fair value on offering date that participants pay for shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

+ Details

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

+ Details

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

+ Details

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- Details

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